Sock



FIG. 1 is a front view of a sock showing our new design, the back being a mirror image thereof;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof. 

CLAIM The ornamental design for a sock, as shown and described. 